**bold-faced print**will be in this glossary. When a new lesson is released, this glossary will be updated. Enjoy!

**subtraction**- The second kind of arithmetic. Subtraction is when we take a certain amount from a number. See the subtraction lessons or Khan Academy for more details.

**subtract**- This is what we do in subtraction. Subtract is the verb form of subtraction, which is a noun. See the subtraction lessons or Khan Academy for more details.

**add**- This is what we do in addition. Adding is combining one number with another. For example: 3+2=5. See the addition lessons or Khan Academy for more details.

**sum**- The answer of an addition problem. For example: the sum of 2+3 is 5. See the addition lessons or Khan Academy for more details.

**carry**- This is something that we do in addition and multiplication. When we carry, we're taking a number into the next column and adding it to the sum (total) of that column. See the addition lessons, multiplication lessons, or Khan Academy for more details.